<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" id="i1">
<input type="button" value="添加帅哥" onclick="f(1)">
<input type="button" value="添加美女" onclick="f(2)">
<script>
    let input = document.querySelector("#i1");//得到文本框对象
    function f(x) {
        let imgName = x==1?"a.jpg":"b.jpg";//得到图片名
        for (let i = 0; i <input.value; i++) {
            let img = document.createElement("img");
            img.src = imgName;
            document.body.append(img);
        }
    }
</script>

</body>
</html>